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https://www.readbyqxmd.com/read/28102026/piperine-a-pungent-alkaloid-from-black-pepper-inhibits-b-lymphocyte-activation-and-effector-functions
#1
David A Soutar, Carolyn D Doucette, Robert S Liwski, David W Hoskin
Piperine has several well-documented anti-inflammatory properties; however, little is known regarding its effect on humoral immunity. In this study, we describe the immunosuppressive effect of piperine on B lymphocytes, which are integral to the humoral immune response. Mouse B cells were cultured in the absence or presence of non-cytotoxic concentrations (25, 50, and 100 μM) of piperine during T-dependent or T-independent stimulation. Piperine inhibited B cell proliferation by causing G0/G1 phase cell cycle arrest in association with reduced expression of cyclin D2 and D3...
January 19, 2017: Phytotherapy Research: PTR
https://www.readbyqxmd.com/read/28101525/untangling-basal-ganglia-network-dynamics-and-function-role-of-dopamine-depletion-and-inhibition-investigated-in-a-spiking-network-model
#2
Mikael Lindahl, Jeanette Hellgren Kotaleski
The basal ganglia are a crucial brain system for behavioral selection, and their function is disturbed in Parkinson's disease (PD), where neurons exhibit inappropriate synchronization and oscillations. We present a spiking neural model of basal ganglia including plausible details on synaptic dynamics, connectivity patterns, neuron behavior, and dopamine effects. Recordings of neuronal activity in the subthalamic nucleus and Type A (TA; arkypallidal) and Type I (TI; prototypical) neurons in globus pallidus externa were used to validate the model...
November 2016: ENeuro
https://www.readbyqxmd.com/read/28101302/robot-assisted-laparoscopic-gastrectomy-for-gastric-cancer
#3
REVIEW
Stefano Caruso, Franco Franceschini, Alberto Patriti, Franco Roviello, Mario Annecchiarico, Graziano Ceccarelli, Andrea Coratti
Phase III evidence in the shape of a series of randomized controlled trials and meta-analyses has shown that laparoscopic gastrectomy is safe and gives better short-term results with respect to the traditional open technique for early-stage gastric cancer. In fact, in the East laparoscopic gastrectomy has become routine for early-stage gastric cancer. In contrast, the treatment of advanced gastric cancer through a minimally invasive way is still a debated issue, mostly due to worries about its oncological efficacy and the difficulty of carrying out an extended lymphadenectomy and intestinal reconstruction after total gastrectomy laparoscopically...
January 16, 2017: World Journal of Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/28100103/systematic-review-of-genetic-risk-factors-for-sustaining-a-mild-traumatic-brain-injury
#4
William Panenka, Andrew Gardner, Michael Dretsch, Gogce Crynen, Fiona C Crawford, Grant L Iverson
INTRODUCTION: This systematic review examined the association between genetics and risk for sustaining a traumatic brain injury. METHODS: Articles published in English from 1980 to July 2016 obtained from the online databases PubMed, PsycINFO®, MEDLINE®, EMBASE, and Web of Science. RESULTS: 5,903 articles were identified, 77 underwent full-text screening, and six were included in this review. Five studies examined the risk of concussion associated with Apolipoprotein E alleles (APOE-ε2 ,ε3 ,ε4,), and polymorphisms of the APOE promoter (rs405509), Brain Derived Neurotrophic Factor (BDNF, rs6265), and Dopamine Receptor D2 (DRD2, rs1800497) were each considered in two studies...
January 18, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28099545/cutaneous-adnexal-carcinoma-with-apocrine-differentiation
#5
Vikram Prasad, Wynn H Kao, Grace F Kao
Primary cutaneous apocrine carcinomas are uncommon malignant neoplasms that can be difficult, if not impossible, to distinguish histologically from metastatic breast carcinomas. We present the case of a 71-year-old man with a 5-year history of extensive ulcerated plaques on the posterior neck and posterior scalp. Biopsy revealed a poorly differentiated infiltrating adenocarcinoma consistent with either primary cutaneous apocrine carcinoma or occult metastatic breast carcinoma. Immunohistochemical analysis demonstrated positive staining for cytokeratin (CK) 7, estrogen receptor, and progesterone receptor, and negative staining for p63, podoplanin, CK20, and thyroid transcription factor 1...
December 2016: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/28099512/age-dependent-oxidative-dna-damage-does-not-correlate-with-reduced-proliferation-of-cardiomyocytes-in-humans
#6
Yanhui Huang, Haifa Hong, Minghui Li, Jinfen Liu, Chuan Jiang, Haibo Zhang, Lincai Ye, Jinghao Zheng
BACKGROUND: Postnatal human cardiomyocyte proliferation declines rapidly with age, which has been suggested to be correlated with increases in oxidative DNA damage in mice and plays an important role in regulating cardiomyocyte proliferation. However, the relationship between oxidative DNA damage and age in humans is unclear. METHODS: Sixty right ventricular outflow myocardial tissue specimens were obtained from ventricular septal defect infant patients during routine congenital cardiac surgery...
2017: PloS One
https://www.readbyqxmd.com/read/28099503/3d-functional-corneal-stromal-tissue-equivalent-based-on-corneal-stromal-stem-cells-and-multi-layered-silk-film-architecture
#7
Chiara E Ghezzi, Benedetto Marelli, Fiorenzo G Omenetto, James L Funderburgh, David L Kaplan
The worldwide need for human cornea equivalents continues to grow. Few clinical options are limited to allogenic and synthetic material replacements. We hypothesized that tissue engineered human cornea systems based on mechanically robust, patterned, porous, thin, optically clear silk protein films, in combination with human corneal stromal stem cells (hCSSCs), would generate 3D functional corneal stroma tissue equivalents, in comparison to previously developed 2D approaches. Silk film contact guidance was used to control the alignment and distribution of hCSSCs on RGD-treated single porous silk films, which were then stacked in an orthogonally, multi-layered architecture and cultured for 9 weeks...
2017: PloS One
https://www.readbyqxmd.com/read/28098993/in-situ-hydrogenation-of-the-zintl-phase-srge
#8
Henry Auer, Dirk Wallacher, Thomas Christian Hansen, Holger Kohlmann
Hydrides (deuterides) of the CrB-type Zintl phases AeTt (Ae = alkaline earth; Tt = tetrel) show interesting bonding properties with novel polyanions. In SrGeD4/3-x (γ phase), three zigzag chains of Ge atoms are condensed and terminated by covalently bound D atoms. A combination of in situ techniques (thermal analysis and synchrotron and neutron powder diffraction) revealed the existence of two further hydride (deuteride) phases with lower H (D) content (called α and β phases). Both are structurally related to the parent Zintl phase SrGe and to the ZrNiH structure type containing variable amounts of H (D) in Sr4 tetrahedra...
January 18, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28098879/cytokines-inducers-and-inhibitors-modulate-mmp-2-and-mmp%C3%A2-9-secretion-by-human-fanconi-anemia-immortalized-fibroblasts
#9
M W Roomi, T Kalinovsky, M Rath, A Niedzwiecki
Acute myeloid leukemia and head and neck squamous cell carcinomas are the major causes of mortality and morbidity in Fanconi anemia (FA) patients. Matrix metalloproteinases (MMPs), particularly MMP-2 and MMP-9, have been implicated in tumor invasion and metastasis. Various cytokines, mitogens, growth factors, inducers and inhibitors control MMP activities. We investigated the roles of these in the regulation of MMP-2 and MMP-9 in human immortalized fibroblasts from FA. Human FA immortalized fibroblast cell lines FA-A:PD220 and FA-D2:PD20 were grown in minimum essential medium (MEM) supplemented with 15% fetal bovine serum (FBS) and antibiotics in 24-well tissue culture plates...
January 16, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28096231/roles-of-5-lipoxygenase-and-cyclooxygenase-2-in-the-biosynthesis-of-hemiketals-e2-and-d2-by-activated-human-leukocytes
#10
Juan A Giménez-Bastida, Takahiro Shibata, Koji Uchida, Claus Schneider
The 2 hemiketal (HK) eicosanoids HKD2 and HKE2 are the major products of the biosynthetic crossover of the 5-lipoxygenase (5-LOX) and cyclooxygenase-2 (COX-2) pathways. HKs result from the rearrangement of a di-endoperoxide intermediate formed in the COX-2-dependent oxygenation of 5S-hydroxyeicosatetraenoic acid (5S-HETE). We analyzed HK biosynthesis in human leukocytes stimulated ex vivo and defined the biosynthetic roles of 5-LOX and COX-2, using inhibitors and incubations with exogenous substrates. Activation of leukocytes with LPS followed by treatment with the calcium ionophore A23187 resulted in the formation of PGE2, 5-HETE, and LTB4 as the principal metabolites of COX-2 and 5-LOX, respectively...
January 17, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28095748/myocardial-inactivation-of-thyroid-hormones-in-patients-with-aortic-stenosis
#11
Bruno Paolino, Pablo Maria Pomerantzeff, Luiz Alberto O Dallan, Fabio Antonio Gaiotto, Nailliw Zanini Preite, Ana Claudia Latronico, Jose Carlos Nicolau, Antonio Carlos Bianco, Roberto Giraldez
OBJECTIVE: To study myocardial thyroid hormone metabolism in patients with aortic valve stenosis (AS) undergoing aortic valve replacement and in patients with coronary artery disease (CAD) undergoing coronary artery bypass grafting surgery. CONTEXT: The human heart expresses the type 2 deiodinase (D2) that activates T4 to T3. At the same time, the inactivating type 3 deiodinase (D3) has been found in a rat model of right ventricular hypertrophy. It is not known whether the human myocardium metabolizes thyroid hormone...
January 17, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28095742/lithium-response-in-bipolar-disorders-and-core-clock-genes-expression
#12
Pierre A Geoffroy, Emmanuel Curis, Cindie Courtin, Jeverson Moreira, Thomas Morvillers, Bruno Etain, Jean-Louis Laplanche, Frank Bellivier, Cynthia Marie-Claire
OBJECTIVES: We examine if the lithium response is associated with changes in core clock genes expressions. METHODS: The effect of a therapeutic concentration of lithium (1mM) on the expression levels of 17 circadian genes, was examined in lymphoblastoid cell lines (LCLs) derived from two well-characterized groups of BD patients, defined as lithium non-responders (NR, n = 20) or excellent responders (ER, n = 16). Quantitative real-time PCR (qRT-PCR) were conducted at 2, 4 and 8 days (d2, d4, d8) with and without lithium exposure...
January 18, 2017: World Journal of Biological Psychiatry
https://www.readbyqxmd.com/read/28095696/properties-of-lanthanide-hydroxide-molecules-produced-in-reactions-of-lanthanide-atoms-with-h2o2-and-h2-o2-mixtures-roles-of-the-i-ii-iii-and-iv-oxidation-states
#13
Xuefeng Wang, Lester Andrews, Zongtang Fang, Kanchana Sahan Thanthiriwatte, Mingyang Chen, David A Dixon
The reactions of laser-ablated lanthanide metal atoms with hydrogen peroxide or hydrogen plus oxygen mixtures have been studied experimentally in a solid argon matrix and theoretically with the ab initio MP2 and CCSD(T) methods. The Ln(OH)3 and Ln(OH)2 molecules and Ln(OH)2(+) cations are the major products and the reactions to form those hydroxides are predicted to be highly exothermic at the CCSD(T) level. Vibronic interations are hypothesized to contribute to the abnormalities in deuterium shifts for Ln-OH(D) stretching modes for several hydroxides, consistent with CASSCF calculations...
January 17, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28095003/cocaine-addiction-as-a-homeostatic-reinforcement-learning-disorder
#14
Mehdi Keramati, Audrey Durand, Paul Girardeau, Boris Gutkin, Serge H Ahmed
Drug addiction implicates both reward learning and homeostatic regulation mechanisms of the brain. This has stimulated 2 partially successful theoretical perspectives on addiction. Many important aspects of addiction, however, remain to be explained within a single, unified framework that integrates the 2 mechanisms. Building upon a recently developed homeostatic reinforcement learning theory, the authors focus on a key transition stage of addiction that is well modeled in animals, escalation of drug use, and propose a computational theory of cocaine addiction where cocaine reinforces behavior due to its rapid homeostatic corrective effect, whereas its chronic use induces slow and long-lasting changes in homeostatic setpoint...
January 16, 2017: Psychological Review
https://www.readbyqxmd.com/read/28094815/drd2-co-expression-network-and-a-related-polygenic-index-predict-imaging-behavioral-and-clinical-phenotypes-linked-to-schizophrenia
#15
G Pergola, P Di Carlo, E D'Ambrosio, B Gelao, L Fazio, M Papalino, A Monda, G Scozia, B Pietrangelo, M Attrotto, J A Apud, Q Chen, V S Mattay, A Rampino, G Caforio, D R Weinberger, G Blasi, A Bertolino
Genetic risk for schizophrenia (SCZ) is determined by many genetic loci whose compound biological effects are difficult to determine. We hypothesized that co-expression pathways of SCZ risk genes are associated with system-level brain function and clinical phenotypes of SCZ. We examined genetic variants related to the dopamine D2 receptor gene DRD2 co-expression pathway and associated them with working memory (WM) behavior, the related brain activity and treatment response. Using two independent post-mortem prefrontal messenger RNA (mRNA) data sets (total N=249), we identified a DRD2 co-expression pathway enriched for SCZ risk genes...
January 17, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28094812/putative-presynaptic-dopamine-dysregulation-in-schizophrenia-is-supported-by-molecular-evidence-from-post-mortem-human-midbrain
#16
T D Purves-Tyson, S J Owens, D A Rothmond, G M Halliday, K L Double, J Stevens, T McCrossin, C Shannon Weickert
The dopamine hypothesis of schizophrenia posits that increased subcortical dopamine underpins psychosis. In vivo imaging studies indicate an increased presynaptic dopamine synthesis capacity in striatal terminals and cell bodies in the midbrain in schizophrenia; however, measures of the dopamine-synthesising enzyme, tyrosine hydroxylase (TH), have not identified consistent changes. We hypothesise that dopamine dysregulation in schizophrenia could result from changes in expression of dopamine synthesis enzymes, receptors, transporters or catabolic enzymes...
January 17, 2017: Translational Psychiatry
https://www.readbyqxmd.com/read/28094253/dynamical-importance-of-van-der-waals-saddle-and-excited-potential-surface-in-c-1-d-d2-complex-forming-reaction
#17
Zhitao Shen, Haitao Ma, Chunfang Zhang, Mingkai Fu, Yanan Wu, Wensheng Bian, Jianwei Cao
Encouraged by recent advances in revealing significant effects of van der Waals wells on reaction dynamics, many people assume that van der Waals wells are inevitable in chemical reactions. Here we find that the weak long-range forces cause van der Waals saddles in the prototypical C((1)D)+D2 complex-forming reaction that have very different dynamical effects from van der Waals wells at low collision energies. Accurate quantum dynamics calculations on our highly accurate ab initio potential energy surfaces with van der Waals saddles yield cross-sections in close agreement with crossed-beam experiments, whereas the same calculations on an earlier surface with van der Waals wells produce much smaller cross-sections at low energies...
January 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28092345/acute-effects-of-a-beverage-containing-bitter-melon-extract-carela-on-postprandial-glycemia-among-prediabetic-adults
#18
C H Boone, J R Stout, J A Gordon, M J Redd, D D Church, L P Oliveira, D H Fukuda, J R Hoffman
BACKGROUND: Acute ingestion of bitter melon (BM) has been shown to suppress the postprandial glycemic response in diabetics, but its impact on glucose regulation among individuals with impaired glucose tolerance is unclear. Moreover, one's glucose tolerance level may influence the effectiveness of BM. This study aimed to examine the acute effects of a beverage containing BM extract on blood glucose regulation during an oral glucose tolerance test (OGTT) among prediabetics. METHODS: Ten prediabetic adults completed two OGTTs-glucose only (D2) and glucose+BM (D3)...
January 16, 2017: Nutrition & Diabetes
https://www.readbyqxmd.com/read/28092083/role-of-dopamine-d2-d3-receptors-in-development-plasticity-and-neuroprotection-in-human-ipsc-derived-midbrain-dopaminergic-neurons
#19
Federica Bono, Paola Savoia, Adele Guglielmi, Massimo Gennarelli, Giovanna Piovani, Sandra Sigala, Damiana Leo, Stefano Espinoza, Raul R Gainetdinov, Paola Devoto, PierFranco Spano, Cristina Missale, Chiara Fiorentini
The role of dopamine D2 and D3 receptors (D2R/D3R), located on midbrain dopaminergic (DA) neurons, in the regulation of DA synthesis and release and in DA neuron homeostasis has been extensively investigated in rodent animal models. By contrast, the properties of D2R/D3R in human DA neurons have not been elucidated yet. On this line, the use of human-induced pluripotent stem cells (hiPSCs) for producing any types of cells has offered the innovative opportunity for investigating the human neuronal phenotypes at the molecular levels...
January 14, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28091646/molecular-hydrogen-production-from-amorphous-solid-water-during-low-energy-electron-irradiation
#20
Kamel A K Gadallah, Demian Marchione, Sven P K Koehler, Martin R S McCoustra
This work investigates the production of molecular hydrogen isotopologues (H2, HD, and D2) during low energy electron irradiation of layered and isotopically labelled thin films of amorphous solid water (ASW) in ultrahigh vacuum. Experimentally, the production of these molecules with both irradiation time and incident electron energy in the range 400 to 500 eV is reported as a function of the depth of a buried D2O layer in an H2O film. H2 is produced consistently in all measurements, reflecting the H2O component of the film, though it does exhibit a modest reduction in intensity at the time corresponding to product escape from the buried D2O layer...
January 16, 2017: Physical Chemistry Chemical Physics: PCCP
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